Aminophosphine oxides in a pyridine series. Studies on the cleavage of pyridine-2- and pyridine-4-yl-(N-benzylamino)-methyldiphenylphosphine oxides in acidic solutions
作者:Waldemar Goldeman、Tomasz K. Olszewski、Bogdan Boduszek、Wanda Sawka-Dobrowolska
DOI:10.1016/j.tet.2006.02.048
日期:2006.5
synthesis and reactions of 1-(N-benzylamino)-1-(2-pyridyl)- and 1-(N-benzylamino)-1-(4-pyridyl)-methyldiphenylphosphine oxides are described. It was found that these compounds were exceptionally easy to cleave in aqueous sulfuric acid solutions to form diphenylphosphinic acid and the corresponding N-(pyridylmethyl)-benzylamines. The structure of a single diastereoisomer, that is, the (R)-(+)-1-[N-(α-met
摘要 描述了1-(N-苄基氨基)-1-(2-吡啶基)-和1-(N-苄基氨基)-1-(4-吡啶基)-甲基二苯基氧化膦的合成和反应。发现这些化合物在硫酸水溶液中非常容易裂解形成二苯基次膦酸和相应的 N-(吡啶基甲基)-苄胺。单个非对映异构体的结构,即 (R)-(+)-1-[N-(α-甲基苄基氨基)]-1-(4-吡啶基)-(S)-甲基二苯基氧化膦的结构由 X-射线晶体学。通过 31P NMR 光谱研究了所选模型手性吡啶氨基膦氧化物的酸性醇解作用。还研究了裂解动力学。在获得的结果的基础上,制定了裂解机制。